Microsoft, on the other hand, maintained that the UWP would be open and promised more information during Build. After the keynote, Head of Xbox Division Phil Spencer confirmed that they would allow UWP applications to be distributed across any store and not just Windows Store.

However, it looks like Sweeney still isn’t satisfied. According to him, at Build Microsoft showed some cool new open features of the Universal Windows Platform and talked about the plan of being open without actually committing to it; he then added that he doesn’t trust the company to keep UWP open without a clear commitment.